Drier



Juiy 7, 193l.- F. D. RDBBINS DRIER Filed Sept. 25.

E a/7K FabbiflS INVENTOR ATTO Y Patented July 7, 1931 Q I FRANK 1). ROBBINS, or; unwnnn onnsou DRIER Application filed September 25, 1929 SerialNo. 395,036.

My invention is intended as a drier and is Fig. is a fragmentary, top, .plan View of primarily intended for the drying of fruits, the breechi'ng leading from the drying nuts, vegetables and other farm products. chamber. Tl1e.same is made to illustrate the The invention consists primarily of a furinduction fans disposed within the breeching.

- nace, a plurality of sloping tray supports and Fig. 3 is a vertical, sectional, endview of means for predetermining the rate and the fans disposed Within the heating chainvelocity of flow of heated air through the her, the same being taken online 3f-3' of furnace and through the column of trays. Fig. 1 looking in the direction. indicated; The heating unit is composed of spaced heads Fig; 4 is. a vertical; sectional, side view of secured to a drum and having a plurality of the furnace, the same being taken online flues in spaced relationship secured to the t-tof Fig. 3.1ookingin the direction indihead upon their oppositely disposed end. cated. p t The fines are disposed in spaced relationship Fig. 5 isa front View. of the furnace and of with the inner surface of the drum and with the; fire door hingedly secured thereto;

15 each other. Means are also provided for the Fig. (iiS a fragmentary, sectional; end View induction of the air through the furnace and ofa portion of the tray stacks disposed withthrough the heat chamber in which the trays in the drying chamber. are placed and means are also provided F'g.7 isa perspective, front view of a roll for dampening the flow or regulating the for regulating the flow of air through the flow within the respective trays and tray drying chamber the same being adapted for chambers. being wound-about a roller. and having spaced The primary object of my invention is to holes'disposedthereiii'through whichthe air. provide means for generating heat within passes, the same to, act as adamper. the heat chamber that will develop and utilize 1 Like reference characters refer to like parts practically all of the'heat contained within throughout the several views.

the fuel being used and that will deliver the 1 is the outer drum or jacket of the heatsame within the drying chamber. ing furnace having spacedheads 3 and A further object of my invention consists haviiigafire door 4 disposed in the outer end in providing a drier of but few parts, one that of the furnace. A central openin 5 i di 3; is relatively cheap in first cost and one that p se(1 Withi th h t 2 f the f c t y be t Over rtflfiltlvely long P which-a smokepipet issecured. The smoke perlods wlth a minimum of .mechanical pipev preferably has several turns or returns gt disposed within the heat chamber 7 in order W th these and incidental ob ects 1n vlew, that the vheat be extracted" from the the invention cons sts in certain novel fea smoke pipe andythat the Same will be e1imi tures of constru-ctlon and combmmzlon i nated within the. heat chamber to niakethe g efientlal 3 of wllch ale liberated heat available for drying purposes. S6 or m 16 appen 8C 0 an a A plurality of'flues 8 are securedupon their ferred form of embodiment of which is herei t o .144) inafter shown with reference to the drawings oppo-sltgly disposedends to the respectlve which accompany and form a part of this of h ur e he m belng 1 $13 specification. relationsh p with the inner surfaceof the In the drawings: jacket and being in' spaced relationship with Fig. 1 is a vertical, longitudinal, sectional each other The bottom flues 9 ofthe series 45 View of the assembled device. 'ts tiupon;grat"ebars and-the iuelfm g n. 99

erating heat within the furnace rests directly upon the bottom flues. The grates 10 are disposed immediately therebelow to prevent a sagging or dropping down of the fines when the same become overheated. The products of combustion drop through the grate bars into the ash pit below. A drying chamber 15 is disposed above the heat chamber and the heat flows from the heat chamber through the drying chamber into the breeching 142- Induction fans 13 are disposed within the breeching for inducing the flow of heated air through the furnace and the drying chamber. The trays are composed of side and end walls with a screen 16 secured in place and the trays are placed within the drying chamber and rest upon guide bars 17 and 18. Baffle bars 19 and 20 are disposed immediately beneath the screen 16 and normally prevent the sagging of the screen after the same has been used for a short time. The sagging of the screen causes the article to be dried to gravitate substantially to the center and pile up in the center and the purpose of the baffles 19 andQO is to prevent the sagging and at the same time to force the air for drying purposes to pass through the central mass to be dried that is disposed upon the screen. An entrance, door 21 is provided at the front of the inclined surface and a removable door is disposed at the oppositely disposed end of the furnace. To prevent the free flowing of the air through the drying chamber, I have found that splendid results are obtained by forms, all coming within the scope of the claim which follows.

What I claim is:

In a device of the class described, in com.- bination with a fruit drying chamber, abreeching vertically secured to the end of the chamber, said breeching divided into a plurality of compartments, an induction fan disposed within each of said compartments, and a roller rotatably disposed between the chamber and the breeching at their meeting edges, said roller having a fabric with a plurality of holes disposed therein.

FRANK D. ROBBINS.

the placing of a roller23 within the end of the breeching and at the upper inclined end of the drying chamber and I secure a fabric to the roller that may be rolled about the roller. Spaced holes 24 are disposed within the fabric. There is a tendency'for the air to flow more freely through one portion of the drying chamber than through other portions of the same and this is corrected by placing holes of different sizes within the fabric screen thereby dampening the flow in certain parts and increasing it in others by predetermining the. -amount of opening through which the same flows. Thepurpose of the fabric screen is to act as a regulatory damper for limiting the free flowing of air through the drying chamber. A common actuator24A is provided'for driving the respective induction fans 13. The power for driving the actuatorshaft 24A is not here shown, but the shaft 24A carries gears and each of the shafts mounting the induction fans have co-acting gears that are adapted for being driven by the gears disposed upon the shaft 24A. While the form of mechanism herein shown and described is admirably adapted to fulfill theobjects primarily stated, it is to be understood that it is not intended it is susceptible of embodiment in various .to confine the invention to the one form of embodiment herein shown and described, as i 

